No one is maintaining that docker image anymore. I suggest to use LXD instead. Create a new LXD container and run the following in order to test superdesk locally.
Thanks for the tip sadly my machine had an issue with hyper-v vswitch creation, I will be testing another machine later tonight. Is it sound to install a vanillla ubuntu 16.4 server, or can you point out if there is a better installation procedure to suit superdesk dependencies.